code: def drop_constraint(self, const: Constraint):
      if const._create_rule is None:
          raise NotImplementedError(
              "No support for ALTER of constraints in SQLite dialect. "
              "Please refer to the batch mode feature which allows for "
              "SQLite migrations using a copy-and-move strategy."
          )
  
imports: from __future__ import annotations
  import re
  from typing import Any
  from typing import Dict
  from typing import Optional
  from typing import TYPE_CHECKING
  from typing import Union
  from sqlalchemy import cast
  from sqlalchemy import JSON
  from sqlalchemy import schema
  from sqlalchemy import sql
  from .base import alter_table
  from .base import format_table_name
  from .base import RenameTable
  from .impl import DefaultImpl
  from ..None import util
  from ..util.sqla_compat import compiles
label_desc: Use image node_id 3 for calling the SQLiteImpl obj's underlying member method code with example usage: obj.drop_constraint(const) without return types